The golden rule you should follow is 70-30. In 10 posts, the sponsored ones should be 3. Violating this rule, you risk to become annoying and irritating to your followers. They usually don’t want to see ads, they want to see you. That’s why it is extremely important to be careful, because if you are oversaturated with ads, your followers will not only be annoyed, but they will also stop having confidence in your words and posts.
Following that way, you’ll stop doing your best for the advertisers, and even if you have followers and likes, you won’t really help the brands you represent. When creating ads, try to incorporate them organically into your content in a way to not repel your audience and future advertisers.